In the blink of an eye, three months passed. Zhang Yuan led the six young men and women in the laboratory to the interstellar trading market for the second time on a small transport plane, accompanied by some interstellar soldiers and rotating human diplomats.

Their main counterparty this time is the Thoth civilization, which is good at magnetic field perception. Humanity is very interested in this strange race, not only in terms of its physiology, but also in the history and culture of this civilization.

Of course, the history and culture of other people's homes are not so easy to obtain, and even human beings cannot promote their own culture and ideas for no reason, which is very taboo and affects their own safety.

Talking about this, Zhang Yuan said solemnly: "So, even if you are curious, don't talk nonsense, our main purpose is to buy some magnetic field sensing organs of the Thoth civilization, that is, biological organs." It would also be nice if you could buy more papers. If there is no ready-made biological organ, it is still too difficult and too difficult for us to fabricate one out of thin air. ”

"But will they sell it? I think it's probably not, even if you buy it with amoeba points, the other party won't be willing. A boy with glasses said.

The cells in an organ must contain all the genetic material of the Toth civilization, and if humans get these genetic materials, they can easily clone a Toth person!

This is again one of the great taboos in interstellar etiquette.

Think about it, if other civilizations cloned a human being, and then used this clone for biological experiments, dissected him. Even if this clone does not belong to the will of human beings, there will still be a big wave within human civilization, and then there will be huge contradictions between the two sides, and it is not impossible for a war to break out!

Or, a malicious civilization has created a specific biological virus against human genes.

Therefore, within human civilization, it is strictly forbidden to sell any cells about themselves, not even a single hair.

The same is true of the Torth civilization in theory.

Zhang Yuan smiled: "So, the mutual trust between civilizations is very difficult, and even a cell is unwilling to be exposed...... But it is not excluded that civilizations that don't care about this kind of ethics can be done anyway. ”

"If we can't do it, we can only settle for the next best thing......"

Soon, arriving at the Inner Ring Trading Area, the human spaceship was connected to the Tothians' communication signals.

Thanks to several transactions, the relationship between the two parties is quite passable.

"Dear human civilization, what new ideas do you have?" This strange-looking alien life is said on the screen. This is the first time they've been on screen.

He looked like a large salamander, with longer limbs and six fingers, which were very flexible, the only thing that differed from the salamander was that it did not have any eyes on its head, and instead had two raised antennae.

In other words, the individuals of this civilization do not feel any light, which may be due to the fact that in ancient times, they lived in dark caves and could not touch the light.

Because of this, the technology tree of the Thoth civilization is very different from the average interstellar civilization. Their tech doesn't need a screen that emits light, but it needs a device that emits a special magnetic field.

Changes in the magnetic field make up the text and pictures of this civilization.

Their most commonly used tool is a strong magnet, when a strong magnet comes into contact with other ferromagnetic substances, some materials will be magnetized and magnetic, so that through magnetic field induction, they can be easily identified and form pictures and words.

Of course, the Toths brain can sense the magnetic field, but there is no way to feel the higher frequency of electromagnetic waves, let alone emit and emit electromagnetic waves, so they still speak, and the frequency of the sound is very high, all of which are ultrasound, and this kind of ultrasound is a kind of perceptual complementarity.

For the human ear, high-frequency sounds are completely inaudible.

Therefore, they perceive the outside world through magnetic fields, ultrasound, touch, smell, and taste, which makes up for the defect of not having eyes to a certain extent. But only to a certain extent.

When the Tothians learned about electromagnetic waves, they also longed for light.

These are all basic materials for civilization.

After Zhang Yuan explained his intentions, the guy on the screen twisted his body, and a line of text appeared on the human screen: "I'm sorry, respected human honor, according to internal security regulations, we can't sell our own organs, even if you pay a lot of amoeba points, you still can't." ”

"In fact, the vast majority of interstellar civilizations with the same morality are unlikely to do so."

"It's okay, it's okay, we can understand!" Zhang Yuan hurriedly said: "We just want to obtain scientific and technological information in this area, but if we don't have a ready-made organ, we really can't design it out of thin air......

He soon came up with another plan: "If your civilization wants to, we can apply for an open biological laboratory in the interstellar trading market to exchange each other's sensory cells." The whole experiment is open to each other, no measurement of gene sequences is allowed, and after the experiment is completed, all specimens are destroyed, and no one is allowed to leave the site except for the data. ”

"What do you think of the fact that we are willing to provide the eyeballs of 167 different creatures, including human eyeballs, and share our knowledge about the biomimicry eye?"

Zhang Yuan added: "Of course, the points of the biological laboratory are paid by us." ”

Just borrow a laboratory, at most 0.1 amoebic points will be done.

After listening to Zhang Yuan's trading plan, the Toth man on the other side of the screen thought for a long time, and was stunned.

As a rare species that can sense magnetic fields, there are actually a lot of exchanges with other interstellar civilizations......

Similar experiments like those proposed by Zhang Yuan have also been done, and even more than a hundred times!

However, more than 20,000 years have passed.

They still haven't seen the true light. Other interstellar civilizations left with the Thothians' magnetic field perception data, but the Thoths, without eyes, did not do well in many experiments, especially biological experiments - it was impossible to get all the organic matter with a little magnetic field.

It is very difficult to obtain this information by relying on ultrasound and magnetic fields alone.

It's too hard, it's really too hard, you can't feel the light, just by the magnetic field, there are too many defects!

However, the Torth civilization is a civilization with strong self-esteem, with many scientists with tenacious personalities, and it is impossible to develop from a difficult environment to the present without a little good quality.

After a long time, a communication came, and the scientists were willing to engage in such experiments because they were given another chance......

Free Opportunity!

The Tothian diplomat sighed, even though he knew that this kind of experiment would most likely be fruitless, and that the other party would take advantage of it in vain. However, even if it is a 1 in 10,000 probability, you have to fight for it.

After this transaction was confirmed, the team led by Zhang Yuan couldn't help but cheer, spending 0.1 amoeba points to have the opportunity to obtain relevant information, which is really too happy for human beings.